单项选择题

Waves generally result from wind ______ on water.

A．acts
B．to act
C．it acts
D．acting
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单项选择题
She's so ______ that she cried for days when her cat died.
A．sensible
B．sensitive
C．touched
D．impressive
单项选择题
The idea ______ you can get a degree without hard work is quite wrong.
A．if
B．whether
C．that
D．which
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